Checking Key Components Of Indoor Unit; Flow Switch - LG AH-W096A0 Service Manual

Checking Key Components of Indoor Unit

1. Checking Key Components of Indoor Unit

1.1 Flow Switch

Start
System stopped
while operation
Pressure gage
indicates 1.5~2.0 bar
(*)
Water pump
still running
The flow switch is
electrically open.
(*): How to identify? - Touch the terminal box (black plastic box at the water pump) of water pump and feel if the
water pump is vibrating. If no vibration, the water pump is not operating. Also, you can see 'Water Pump Operating
Icon( ) ' at control panel.
• Although there is not water flow inside water circuit, the flow switch detects as if water is flowing.
It is due to electrically closed (or short) of flow switch or the contact of flow switch is mechanically stuck.
A
• Contact official After Service Center and replace the flow switch.
• Check if water inside water circuit is fully charged. Pressure gage at the indoor unit should indicate
1.5~2.0 bar.
• Also, as the hand of the pressure gage is not react so fast according to water charging, check the
B
pressure gage again.
• Otherwise, there can be water leakage inside water circuit. Examine if water circuit is completely sealed.
• Although water is well flowing, the flow switch can not detect water flow. It is due to electrically)
open of flow switch or the contact of flow switch is mechanically broken.
C
• Contact official After Service Center and replace the flow switch.
• Read 'Checking Key Components of Indoor Unit – Water Pump' carefully to get more detail information.
• Contact official After Service Center and replace the water pump.
D
• Also, check the water quality if there are particles that can yield locking at the shaft of the water pump.
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Only for training and service purposes
(*)
NO
Water pump
running
YES
Water is not enough
NO
or there can be
water leakage inside
water circuit.
YES
NO
Control Panel
Shows 'CH14'
YES
The water pump
is in trouble.
C D
NO
Control Panel
Shows 'CH14'
YES
The flow switch is
electrically closed.
B
NO
YES
- 50 -
NO
YES
A
END
(it is normal
condition)
LGE Internal Use Only